Send a calendar invite to a BlackBerry user on the Exchange 2003 server and Exchange 2007 and tell me if they both get the invite on their handheld.

It turns out our Exchange 2003 box is shutdown as of last week. :(, so I can't test it right now. But when we first started the migration, I remember doing lots of tests, including calendar, as there were reported issues by RIM (this was before 4.1.3, we were running 4.1.2). And everything was fine.

I tested the calendar request to a user on Exchange 2007 and it is fine, the request came in to the handheld, I accepted it on the handheld and on the handheld and desktop I can see the meeting in the Calendar. And like I said on BES we are running ESM 2003, not CDO & MAPI clients for 2007. I wonder with a fix/patch the CDO and MAPI dll versions changed. CDO.dll is 6.5.7638.2 and MAPI.dll is 1.0.2536.0.